Hello, thanks for having me! I have kept cichlids, discus, koi, and fancy goldfish since I was 10. I'm now 30 and recently got back in the hobby after persuading my 12 year old nephew to as well! I currently have a 15 gallon high tank with an Eclipse system 1. No heater is necessary. The water temperature stays between 74 and 76 degrees. I keep the florescent light on a timer from 5pm to 12am. Bare bottom with a few silk plants for shelter. I feed my fish omega one color enhancing flakes. I also do bi weekly water changes of 10 percent. My nitrate, nitrite, gh, and ammonia levels are all perfect in normal parameters. I've had my water tested at the pet store. I'm going to purchase a full API test kit unless someone has a better recommendation. PH 7.2 The tank has been running since January. I began a fishless cycle and fed the water for 3 weeks. Added 3 zebra danios. Then in Feb I added 2 more danios. I also adopted 2 very feisty golden algae eaters. I then added 1 tiger Barb and 1 green Barb. Then last week the Tiger Barb just died. Found on filter intake. He seemed bashful / slow from day one. Today I added 3 cardinal tetras, 2 more green tiger barbs, and 1 dwarf otocinclus catfish. This is a grand total of 5 danios, 3 barbs, 3 cardinal tetras, 2 golden algae eaters, 1 Otto or 14 fish. In looking at the tank it doesn't appear over stocked. The danios stay up top, the barbs in the middle, and Cardinals on the bottom. Have I added too many fish? Should I buy a canister filter? Maybe add a 10 gallon tank below on the same stand with another Eclipse hood? Thinking of ditching the 2 golden algae eaters so the Otto is well fed. They barely eat the glass algae anyway. They just rummage the silk plants for leftover flakes. Thanks for your time!